commit bcd022801ee514e28c32837f0b3ce18c775f1a7b
author Atsushi Nemoto <anemo@mba.ocn.ne.jp> Tue Dec 12 17:14:56 2006 +0000
committer Linus Torvalds <torvalds@woody.osdl.org> Wed Dec 13 09:27:08 2006 -0800
tree 6230fbec80e9f1c7580efa685ded26f638f81ef0
parent 9de455b20705f36384a711d4a20bcf7ba1ab180b

[PATCH] MIPS: Fix COW D-cache aliasing on fork

Provide a custom copy_user_highpage() to deal with aliasing issues on
MIPS.  It uses kmap_coherent() to map an user page for kernel with same
color.  Rewrite copy_to_user_page() and copy_from_user_page() with the
new interfaces to avoid extra cache flushing.

The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>